That vid was not even full throttle, it actually wouldnt even hit 30 psi because it couldnt put enough load on the motor before just blowing the tires off. That was giving it about 1/2 throttle at first then slowly going to the floor.
this is what happened when i would just blip the throttle to the floor on that much boost.
YouTube - Nissan Sentra SE-R Turbo 30psi in 4th gear B13 SR20DET
My a/f was a bit rich in the peak torque range and up top because i had the fuel pressure up at around 3.7 bar on a 3 bar program. The next day after those vids i dropped it down to 3.2 bar and the a/f came out dead on perfect and picked up sooooo much power all across. That was right before going to the track. I was doing some fine adjustments. That was on a Calum basic 740, 3 bar program. All i did was mess with base timing and fuel pressure. Never had any problems running 30psi.
I had to do pulls in 5th gear to really see what my electronic boost controller was set to to hit 30psi. Its the only gear that wouldnt just blow the tires off of. Even 5th around peak torque was starting to break the tires loose almost to redline. haha Its insane. On those runs even burning the tires it still accelerated hard from 70mph to 130mph at 8k rpms. Cant wait to get my car together with the new setup. Btw in the vids im running 205/50/15's with the tire pressure at around 25psi. Didnt matter, haha